Abstract
Successful gene delivery vectors for clinical translation should have high transfection efficiency and minimal toxicity. In this work, well-defined poly(2-hydroxyl-3-(2-hydroxyethylamino)propyl methacrylate) (PGEA) vectors with flanking cationic secondary amine and nonionic hydroxyl units were prepared via the ring-opening reaction of the pendant epoxide groups of poly(glycidyl methacrylate) with the amine moieties of ethanolamine. It was found that PGEA carriers possess very low toxicity (<10% of the toxicity of branched polyethylenimine (PEI, 25 kDa), while exhibiting surprisingly excellent transfection efficiency (higher than or comparable to that of PEI (25 kDa)) in different cell lines. A series of transfection and cytotoxicity assays revealed that PGEAs are highly promising as a new class of safe and efficient gene delivery vectors for future clinical gene therapies.
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